Can't acess the verification code

My dad gave his old Macbook Air 13inch Mid 2013. And whenever I try to log in with my Apple ID, it asks me for a verification code from my "Other devices". The Other device, in this case, is my old iPhone 6S, which is completely destroyed, to the point that it can't be fixed nor turned on. I've been trying to look for an answer online, but I can't seem to find as to how exactly I can log in to my apple id in a new device if I can't access the verification code in my old device where my apple ID is most likely still signed in. I did notice an option that I can remove the iPhone 6S from my devices list, but with the warning that I won't be able to log in to my Apple ID account without that device, I don't understand, if I should remove the phone from my devices.